Dennis Dashkevich dskecse

This can reduce files to ~15% of their size (2.3M to 345K, in one case) with no obvious degradation of quality.

ghostscript -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/printer -dNOPAUSE -dQUIET -dBATCH -sOutputFile=output.pdf input.pdf

Other options for PDFSETTINGS:

/screen selects low-resolution output similar to the Acrobat Distiller "Screen Optimized" setting.
/ebook selects medium-resolution output similar to the Acrobat Distiller "eBook" setting.
/printer selects output similar to the Acrobat Distiller "Print Optimized" setting.
/prepress selects output similar to Acrobat Distiller "Prepress Optimized" setting.

Two (or three) powerful iterators

If you have some experience working with Ruby you probably had to deal with collections. Collections can be tedious. But TTR (Thanks To Ruby) we have a large arsenal to deal with them!

In this post I'll show you two Ruby iterator methods I really love, thanks to its simplicity and beauty.

My whimsical example

I'm planning on either writing this up in detail or maybe doing a screencast about screencasting, but I'll give a short version here.

On sound quality:

This matters a lot. In decreasing order of importance:

Remove echo. You have to hear this to understand. Set up a mic in front of your mouth and record a sentence. Then, put a thick comforter over you and the mic and say it again at the same distance. Listen to

Rails flash messages with AJAX requests

original: http://stackoverflow.com/a/10167659/656428

	from abc import ABCMeta
	from random import randint


	class SortableGoods(object):
	__metaclass__ = ABCMeta

	_GOODS_CLASSES_PRIORITY = {
	'Person': 0,
	'Container': 1,

	def method1
	end

	def method2(default: 1)
	end

	method(:method1).arity # => 0
	method(:method2).arity # => 0

	#!/usr/bin/env bash
	curl https://s3.amazonaws.com/heroku-jvm-buildpack-vi/vim-7.3.tar.gz --output vim.tar.gz
	mkdir vim && tar xzvf vim.tar.gz -C vim
	export PATH=$PATH:/app/vim/bin

	// Just before switching jobs:
	// Add one of these.
	// Preferably into the same commit where you do a large merge.
	//
	// This started as a tweet with a joke of "C++ pro-tip: #define private public",
	// and then it quickly escalated into more and more evil suggestions.
	// I've tried to capture interesting suggestions here.
	//
	// Contributors: @r2d2rigo, @joeldevahl, @msinilo, @_Humus_,
	// @YuriyODonnell, @rygorous, @cmuratori, @mike_acton, @grumpygiant,

	#!/usr/bin/env ruby

	# Maximum Subarray

	# Using any language or technique, write a program that meets the following criteria:

	# Given an array containing positive and negative integers, return the maximum sum that
	# can be generated from any contiguous set.

	# For example in the following array:

	class SetupHstore < ActiveRecord::Migration
	def self.up
	enable_extension "hstore"
	end
	def self.down
	disable_extension "hstore"
	end
	end